it is a technological wonder that we take for granted. in its 120-year lifetime, the escalator has helped to make life easier and people lazier. early escalators were little more than a conveyor belt without steps. some even had saddles for the users to sit on. the escalator truly came of age with the construction of subway systems. passengers were ferried up and down the underground. soon department stores were replacing elegant staircases with their moving counterparts. now escalators have melted seamlessly into the background of modern life. a giant outdoor escalator has even been installed in colombia. the only drawback is they are prone to breakdowns, and then it is a case of back to the stairs. still, if this one is anything to go by, the escalator at 120 is still capable of scaling new heights. >> before we go, we do just have time to recap of our top story -- the hostage crisis in algeria. several foreign hostages held at the internationally operating gas plant in algeria have reportedly been killed when the algerian armed forces